چکیده مقاله
Recent developments in tunnel ventilation have increased the immediate need for removing exhaust gas emitted from vehicles in road tunnels The objective of this study is to assess the effect of jet fans on extracting detrimental gases emitted from vehicles in Northern Koohsar Mahdi urban tunnel in Shiraz, such as Carbon Monoxide, CO, dispersion along the tunnel The effects of mountain blocks, located at the inlet and outlet of tunnel, on flow field are also investigated Furthermore, the present study aims to develop a new method for jet fan simulation which presents a more accurate model of the jet fans Computational Fluid Dynamic CFD is carried out to simulate the ventilation in the tunnel, while the k ε model is used for turbulence modeling The results present that existence of mountain blocks in the inlet and outlet of the tunnel affects dramatically on the flow field, causing 8 8% drop on the tunnel volume flow rate Moreover, it is shown that due to the effect of jet fans, the average amount of CO in the tunnel is about 55 7 ppm, while the permissible level of this is 70 ppm, to be on the safe side
کلیدواژهها
نویسندگان
Esmaeel Eftekharian
School of Mechanical Engineering, Shiraz University, Shiraz, Iran
Alireza Dastan
Associate Professor
Omid Abouali
School of Mechanical Engineering, Shiraz University, Shiraz, Iran
Javad Meigolinedjad
Research and Development Department, Shiraz Municipality, Shiraz, Iran
شیوه ارجاع
Eftekharian, Esmaeel and Dastan, Alireza and Abouali, Omid and Meigolinedjad, Javad,1391,Numerical Simulation of CO dispersion in Northern-Koohsar Mahdi urban tunnel in Shiraz,12th International Conference on Traffic and Transportation Engineering,Tehran
ارائهشده در
مجموعه مقالات دوازدهمین کنفرانس بین المللی مهندسی حمل و نقل و ترافیک1 اسفند 1391 · تهران